MIPS: add nmi_enter() + nmi_exit() to nmi_exception_handler()

We need to enter NMI context when NMI interrupt fires.

Signed-off-by: Petri Gynther <pgynther@google.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11323/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index fdb392b27e81..efcedd43780f 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1856,12 +1856,14 @@ void __noreturn nmi_exception_handler(struct pt_regs *regs)
 {
         char str[100];
 
+        nmi_enter();
         raw_notifier_call_chain(&nmi_chain, 0, regs);
         bust_spinlocks(1);
         snprintf(str, 100, "CPU%d NMI taken, CP0_EPC=%lx\n",
                  smp_processor_id(), regs->cp0_epc);
         regs->cp0_epc = read_c0_errorepc();
         die(str, regs);
+        nmi_exit();
 }
 
 #define VECTORSPACING 0x100     /* for EI/VI mode */